Possibilities for para rubber production in the Philippine Islands
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書誌事項
Possibilities for para rubber production in the Philippine Islands
（Trade promotion series, No. 17）
Government Printing Office, 1925
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注記
"Prepared under the direction of H.N. Whitford, Chief, Crude Rubber Section, Rubber Division as part of the survey of essential raw materials authorized by the Sixty-seventh Congress"
At head of title: Department of Commerce, Bureau of Foreign and Domestic Commerce
"Crude rubber survey"
Bibliography: p. 100-101